Looks like a pretty good kit, instead of downsizing though, have you thought of splitting it? Keep all the single items in the kit, along with some of each of the multiple items and put the rest of the multiple items in a dry bag to be carried in your main pack (call it a reserve). You've stated that the med.s/dressings are meant to last several days, you don't need to pack them along on a day hike, but you'll have them in the bottom of the main pack as a back-up in case you ever find yourself in need of them, sort of the same principle as a combat load in web gear, and reserve supplies tucked away in good ol' A.L.I.C.E.
Just my two cents

Troy